Turing compant



(No Model.) 3 Sheets-Sheet 1.

' J. M. CASE.

GRADUAL REDUCTION MACHINE FOR MILLING. ,759.

Patented Apr. 29, 1884.

Even/6o r: Jbhn .16. 0008 e,

N. PETERS. PlIolfl-Lmlngnpiwn Washington. D. c.

(No Model.) a shet's she et 2.

Y J, M. CASE. GRADUAL REDUCTION MACHINE FOR MILLING. No. 297,759. Patented Aprl29, 1884.

N4 PETERS. Phowumo n hm Wflhingtcm 0.6.

(No Model.) 3 Sheets-Sheet s.-

v J M. CASE.

GRADUAL REDUCTION MACHINE FORMILLING;-

No. 297,759, Patented Apr. 29,1884;

' llNiTiE TATES PATENT Erica.

I JOHN M. CASE, or COLUMBUS, onto, nssrcnon To THE CASE MANUFAC- TUBING COMPANY, or SAME PLACE.

GRADUAL-REDU CTION MACHINE FOR MlLLiNG.

SPECIFICATION forming part of Letters Patent No. 297,759, dated April 29, 1884.

7 Application filed May 31, 1883. (No model.)

To 11% whom it may concern: fast rolls being on one side and that driving 50 Be it known that I, JOHN M. CASE, a citithe slow rolls on the other side. The belt zen of the United States, residing at Coluinwhich drives the slow rolls I usually cross, bus, in the State of Ohio, have invented an while the belt which drives the fast rolls is a Improvement in Gradual-Reduction Machines straight belt. The tightening device is so arfor Milling, of which the following is a speci-- ranged that one common lever on each side of f 5 5 fication. the machine operates a series of tightenin My invention relates to that class of grainpulleys, and by a slight movement of the lereduction machines where a series of rolls are 'ver the belt may be loosened, so as to cause arranged in one common frame and combined the machine to stop, or by tightening it the in such a manner that the several reductions machine may be put in operation. The conand separations of the material are made in struction of the bearings of the rolls, the means one common machine. The machine is conof opening and closing the rolls, and for levstructed with a series of vertical rolls corrueling is the sameas thatI use in my four-roller I 5 gated in the usual manner and combined in mill, for which invention I have made applione common frame. The frame containing cation for patent of even date herewith, Sethe bearings of the rolls is constructed of iron. rial No. 96,699. The flow of the material over To this iron frame I bolt a wooden frame, to the screens and the return of the material which frame are attached wooden boards for after being sifted to the next rolls are accom 20 inclosing the screens. By this construction I plished by the use of reverse hangers, which am enabled to make a machine of any desired are supported in disks or plates having circulength and any desired screening capacity by lar slots, in such a manner that the stock may simply buildingontotheironframethewooden be caused to travel down the riddle and reextension of a length sufficient to receive the turn with whatever degree of rapidity the 25 required screening apparatus. Ordinafily I miller may desire. The returning-boards bemake the screens about seven feet long; but neath the screens are supported by links or they may be much longer or shorter. At the hangers suspended fromthe same slotted disks, end of the wooden inclosure I construct averbut in reverse positions to those which suptical discharge-chamber, which is common to port the riddles or screens above. This causes 0 all the several screens or riddles, the object the material to pass backward to the next sucof this discharge-chamber being to conduct cessive pair of rolls. The hangers consist of the material to any desired point in the mill, links loosely pivoted to the screens and returnor, as I prefer, it may be connected to a sucboards, respectively, and having at their uption-fan, which suction-fan may be used both per ends wrist-pins which pass through cir- 3 5 for the purpose of elevating the material and cular slots in the disks. When all the pins are also producing a separation of the stock, thus in the lower entremities of the slots, the sieves taking out much of the fibrous and impure and boards Wlll be horizontal, or nearly so. .material. In this system of elevation and Consequently the progress of the material purification of the stock I use dust-catchers from the receiving to the delivering ends W111 0 and settling-chambers, as represented in my be less rapid than when the hangers at the application for patent for atmospheric elevareceiving ends occupy positions nearer the 0 tors for bolts of even date herewith, Serial summits of the slots. A reversal of this ef- No. 96,702. In mypresent machine I use one feet may be produced by elevating the hangshaking screen for each reduction, and also a ers at the dellvery ends. .I employ a shaking 45 return conveyer-board, which is so arranged device by means of WhlGll I operate the whole as to cause the material, after being sifted, to series of riddles and return-boards by one com- 5 be carried back to the next reduction. The mon eccentric shaft and eccentric band. This several rolls are driven by one endless belt on shaking device is so constructed as to balance each side of the machine, the belt driving the the momentum of theseveral riddles giving (No Model.)

' 2 SheetsSheet 1. J. M. CASE. GRADUAL REDUOTIONMAOHINE FOR MANUFACTURING FLOUR. No. 297,760.

1.2 Aatanted Apr; 29, 1884.

12111 1 35 J. (a/se/ N. PETERS. Pinto-Lithograph. Tllithington. 9.0. 

